The Rate of Amylose Precipitation from a Dilute Solution
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概要
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The rate of precipitation of the retrograded amylose product from a dil. amylose solution was determined by the centrifugal method. The results showed that the relation of the quantity of precipitate vs. time did not fit the typical second order reaction for the coalescence of colloidal particles but fitted the crystallization formula, in appearance. The rate of precipitation was in proportion to (c-ca)1, 5, where c is the amylose concentrationand ca the concentration of the dil. solution phase in the phase-separated solution. Whenthe temperature dependence of the rate was treated according to the crystallization of polymers, it was found that the rate was in proportion to Tm2/T(ΔT)2, where.Tm is the melting point of the polymer in solution and ΔT is (Tm-T). The Tm thus obtained was 120°C for an amylose solution. These results suggested a certain correlation between the amylose retrogradation and the crystallization.
- 社団法人 日本農芸化学会の論文
著者
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Hayashi Akira
Department 4 Planning Division Motorcycle R&d Center Honda R&d Co. Ltd.
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KOTANI Yoshihiko
Department of Chemistry, Ritsumeikan University
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CHO Chung-Ho
Department of Chemistry, Ritsumeikan University
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